/*
 * The org.opensourcephysics.media.core package defines the Open Source Physics
 * media framework for working with video and other media.
 *
 * Copyright (c) 2004  Douglas Brown and Wolfgang Christian.
 *
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA
 * or view the license online at http://www.gnu.org/copyleft/gpl.html
 *
 * For additional information and documentation on Open Source Physics,
 * please see <http://www.opensourcephysics.org/>.
 */
package org.opensourcephysics.media.core;

import java.awt.*;
import java.awt.event.*;

import org.opensourcephysics.display.*;

/**
 * This is a general purpose mouse handler for a video panel drawing TShapes.
 *
 * @author Douglas Brown
 * @version 1.0
 */
public class VideoMouseHandler implements InteractiveMouseHandler {

  // instance fields
  Interactive iad = null;
  TPoint p = null;
  Rectangle bounds;

  /**
   * Handles a mouse action for a video panel.
   *
   * @param panel the video panel
   * @param e the mouse event
   */
  public void handleMouseAction(InteractivePanel panel,
                                MouseEvent e) {
    if (!(panel instanceof VideoPanel)) return;
    VideoPanel vidPanel = (VideoPanel)panel;
    switch(vidPanel.getMouseAction()) {
      case InteractivePanel.MOUSE_PRESSED:
        if (iad != null && iad instanceof TPoint) {
          p = (TPoint)iad;
          bounds = p.getBounds(vidPanel);
          p.setXY(vidPanel.getMouseX(), vidPanel.getMouseY());
          if (bounds !=  null) {
            bounds.add(p.getBounds(vidPanel));
            vidPanel.repaint(bounds);
          } else {
            vidPanel.repaint();
          }
        }
        break;
      case InteractivePanel.MOUSE_RELEASED:
        iad = p = null;
        break;
      case InteractivePanel.MOUSE_DRAGGED:
        if (p != null) {
          bounds = p.getBounds(vidPanel);
          p.setXY(vidPanel.getMouseX(), vidPanel.getMouseY());
          if (bounds != null) {
            bounds.add(p.getBounds(vidPanel));
            vidPanel.repaint(bounds);
          } else {
            vidPanel.repaint();
          }
        }
        break;
      case InteractivePanel.MOUSE_MOVED:
        if (vidPanel.isDrawingInImageSpace())
          iad = vidPanel.getInteractive();
        if (iad != null && iad instanceof TPoint)
          vidPanel.setMouseCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
        else vidPanel.setMouseCursor(Cursor.getDefaultCursor());
        break;
    }
    if (p == null) vidPanel.hideMouseBox();
    else p.showCoordinates(vidPanel);
  }
}

